My 78 GTS has smiths guages and it seems that the speedo reads much faster than I am going. The needle is a bit jumpy also. It will read 50mph when I feel like im going approx 30-35 mph. Could there be kph parts in there that are throwing me off? It also makes me wonder how far off my actual mileage may be. The bike reads over 37000 miles but could be much less if this has been going on long before I got it.

79 Darmah
78 900 GTS
86 F1B
80 SSD
02 Harley FXD
72 H2 750 triple
08 KTM 300XC
there has yet to be a motorcycle line made that is as satisfying to ride, hear and look at as the ducati bevels